140170800821 has 2 divisors, whose sum is σ = 140170800822. Its totient is φ = 140170800820.

The previous prime is 140170800797. The next prime is 140170800853. The reversal of 140170800821 is 128008071041.

It is an a-pointer prime, because the next prime (140170800853) can be obtained adding 140170800821 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140110970596 + 59830225 = 374314^2 + 7735^2 .

It is an emirp because it is prime and its reverse (128008071041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140170800821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140170800521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70085400410 + 70085400411.

It is an arithmetic number, because the mean of its divisors is an integer number (70085400411).

Almost surely, 2^140170800821 is an apocalyptic number.

It is an amenable number.

140170800821 is a deficient number, since it is larger than the sum of its proper divisors (1).

140170800821 is an equidigital number, since it uses as much as digits as its factorization.

140170800821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 32.

Adding to 140170800821 its reverse (128008071041), we get a palindrome (268178871862).

The spelling of 140170800821 in words is "one hundred forty billion, one hundred seventy million, eight hundred thousand, eight hundred twenty-one".